Car-wheel-grinding machine



(No Model.) 4 Sheets-Sheet 1.

D. 0. SWEET. GAR WHEEL GRINDING MACHINE.

(No Model.) 4 Sheets-Sheet 2.

D. 0. SWEET. CAR WHEEL GRINDING MACHINE.

Patented July 6, 1897.

(No Model.) 4 Sheets-Sheet 3 D. 0. SWEET. CAR WHEEL GRINDING MACHINE.

No. 585,836. Patented July 6,1897.

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(No Model.) 4 Sheets-Sheet 4. D. 0. SWEET.

GAR WHEEL GRINDING MACHINE.

Patented July 6, 1897.

77ci7zes 5 e5 PATENT U rrrcn.

DAVID C. SYVEET, OF SPRINGFIELD, MASSACHUSETTS.

CAR-WHEEL-GRIN DING MACHINE.

SPECIFICATION forming part of Letters Patent No. 585,836, dated July 6,1897.

Application filed January 23,1897. Serial No. 620,431. (No model.)

To ctZZ whom it may concern:

Be it known that I, DAVID 0. SWEET, a citizen of the United States, anda resident of Springfield, in the county of Hampden and State ofMassachusetts, have i nvented certain new and useful Improvements inCar-VVheel- Grinding Machines, of which the following is aspecification.

This invention relates to improvements in machines for grinding andtruing up the wheels of street-railway and other cars and vehicles afterthey have become flat or uneven on their rims.

The object of the invention is particularly to improve and simplify theconstruction of the machine of the character described and to enable itto be easily mounted and immovably sustained, so as to present itsgrindingwheels to work upon one or both of the two car-wheels on asingle axle, said wheels to have traversing movements and also bodilyfeeding movements forward as-the grinding progresses.

The invention is fully and clearly illustrated in the accompanyingdrawings, rendered manifest in the following description, and brieflyset forth in the claims.

In said drawings, Figure 1 is a plan View of a car-wheelgrinding machineembodying my present improvements. Fig. 2 is a front elevation of themachine as supported at about the level of the track over the car-housepit and as in operative proximity to the two carwheels on one axle,which latter is understood as jacked up above the track. Fig. 3 issubstantially an end elevation of the car-wheelgrinding machine, themachine embodying in some respects modifications which will behereinafter referred to. Fig. 4 is a plan view of one end portion orhalf of the grindingmachine shown in Fig. 3. Fig. 5 is a view showingthe duplex car-wheel-grinding machine havingits grinding-wheel shaftsdriven from the motor by toggle-supported gearwheels, a modifiedarrangement of means comprised under the present invention. Fig. 6 is aplan view of one-half of the machine shown in Fig. 6.

Similar characters of reference indicate corresponding parts in all ofthe views.

This machine is understood as being duplex or having two grinding-wheelswith duplii the pit in the car-house) by the clips d and clamp-bolts e.The said clips are fitted about and slide along the tie-bars, being adjustably confined by the set-screws or bolts 17, and

they have depending angular extensions 18, through the vertical membersof which the bolts e are screwed, so as to abut by their protruding endsagainst the sills 19 at the opposite borders of the pit. (See Fig. 2.)These tie-bars and confining clips or clamps are illus tratedand'described and comprised as a portion of the subjectmatter in certainof the claims in my former application for patent for acar-wheel-grindin g machine filed by me November 21,1896, Serial No.612,965. Each base A supports a standard B for the horizontalgrinding-wheel shaft C, on which is fixed the grinding-wheel G and thestandard has its base B movable along the fixed baseA toward and awayfrom the rim of the jackedup car-wheel G. The fixed base A has theupstanding ear-lug 20, through which turns without moving axially ascrew-shaft f, having a hand-wheelf ,by which to turn it. Thisscrew-shaft threads into the upstanding earlug 31 on the standard-base Band the turning of said hand-wheel moves the grindingwheel bodily towardand from the oar-wheel to be ground thereby.

The grinding-wheel shaft 0 is somewhat longer than its journal 22 in thestandard B and may play therethrough endwise. an inner end portion ofeach grinding-wheel shaft, which is necked down, as seen at 23, aconnection member g engages by the forked or encircling endportion'thereof, and said connection member g is articulated to atraversing lever; h, which is pivoted to swing in a horizontal plane onan ear-piece 24 or suitable projection on the base B This connectionmember 9, as shown in Figs. 1 and 2, consists of an upright arm, havinga rod or shaft 9 With TOO

affixed thereto, which projects horizontally therefrom, playing in aguide-socket 25 in the standard B, parallel with and under thegrinding-shaft journal. Said traversing lever h engages this uprightarm, and by the provision of the said rod or shaft 9 and the horizontalsocket in which it plays, an easy endwise motion is imparted to thegrinding wheel shaft, obviating binding or cramping as thegrinding-wheel is given its motion across the tread-face of thecar-wheel.

The portion of the horizontal machineframe, constituted by the tie-barsa a, serves as the support for an electric motor J, which is supportedby or suspended from the said tie-bars, as seen in Figs. 1, 4:, and 6.In Figs. 1 and 2 the motor is shown supported slightly above the levelof the said tie-bars, while in Figs. 3, 4, 5, and 6 the correspondingmotorsupportj is indicated as being in the form of a three-sided andpendent frame whereby the motor is hung farther below the level of thegrinding mechanism.

The motor is provided with the usual or suitable contacts 27 and 28,Fig. 2, for the connection therewith of the electric wires 29 29,whereby the current may be taken from any available source.

M represents the driving-shaft of the motor, preferably compriseddirectly in the motor, as the armature-shaft, and this has suchconnection with each grinding-wheel shaft 0 that the running of themotor will cause the speeding of the grinding-wheels and yet not inter-.

fere with the traverse of the said grindingwheels or the bodily feedthereof. In Figs. 1 and 2 this driving connection for eachgrinding-wheel shaft 0 is as follows: The grinding-wheel shaft issuitably inwardly extended, with which end by the universal joint mconnection is made with one end of the splined and telescoping shaft n,having at its other end by the universal joint 0 connection with theadjacent end of the motor-shaft M.

In Figs. 3 and 4 the motor-shaft is shown as having thereon asprocket-wheel m the grinding-wheel shaft likewise having thereon asprocket-wheel 0 and around these wheels a sprocket-chain or drive-chainn has a running engagement.

In order to show that I may practice a variety of ways of imparting fromthe motorshaft the rotary motion to thegrinding-wheel shaft orduplicated grinding-wheel shafts, which shaft or shafts are capable ofthe bodily feed motions across their axes, aforementioned, I haveillustrated in Figs. 5 and 6 another medium of driving connectionbetween the motor-shaft M and the grindingshaft, which consists in thelinks or toggle members m 0 pivotally united one to the other at 36 by asuitable bolt or pintle and each respectively hung upon the motor andgrinding-wheel shafts M O by being suitably recessed or perforated.

The motor-shaft has a gear-wheel m thereon, and each grinding-wheelshaft has a corresponding gear-wheel 0 thereon, while an intermediategear-wheel u is mounted to rotate on the pintle 30 or other suitable support therefor which is coincident with the axis of the joint-pivotuniting the toggle members. Whether in the action of the machine and asthe grinding-wheels are fed up to or retreated from the car-wheel to beground and whether the toggles are straightened out or more or lessrelatively bent the gearwheels 0 'LL m always remain in mesh.

Substantially the same mechanism as just described in conjunction withFigs. 5 and 6 of the drawings is particularly described and specificallyclaimed in an application for patent for car-wheel-grinding machinesfiled by me June 10, 1897, Serial No. 640,294..

In Figs. 3 to G, inclusive, the traversing lever 7L2 for eachgrinding-wheel shaft is pivotally supported at about the level of theshaft and, having the forked end 7L3 directly engaging the necked-downshaft, provides a somewhat simpler means for traversing thegrinding-wheels than the traversing devices shown in Figs. 1 and 2,which, however, are

especially available in certain designs of the grinding-machine of thepresent type.

From the foregoing descriptions and the illustrations presented itbecomes apparent that the entire machine having the duplicated grindingmechanisms and the operating devices therefor, together with theelectric motor, need not be very heavyor expensive and that the machineis easily set in place in relation to the car-wheel to be ground.Furthermore, the motor, having its position intermediate between andsomewhat remote from the grinding-wheels, will not be disadvantageouslyaffected by grit or dust occasioned in the grinding operation, and it isto be especially noted that in the use of this machine, while bothgrinding-wheel shafts are driven from the single shaft of a motor, itbecomes possible, as permitted by the independent driving connectionsbetween the motor-shaft and each of the grinding-wheel shafts, tooperate on either or both the car-wheels on the same axle much orlittle, as the occasion demands.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-

1. In a car-wheel-grinding machine, aframe constructed to be mounted onand extend between the car-tracks, comprising at its ends, basesupports, grinding wheel standards movably mounted thereon,grinding-wheel shafts j ournaled in said standards, the motor supportedon said frame, and driving connections between said motor and thegrinding-wheel shafts, substantially as and for the purpose described.

2. In a car-wheel-grinding machine,a frame constructed to be mounted onand across a track, comprising at its ends, base-supports,grinding-wheel standards movably mounted thereon, grinding-wheelshafts,with grindin g- IOC IIO

wheels, j ournaled in said standards, and movable endwise therethrough,levers engaging the said end wise-movable shafts, a motor support-ed onsaid frame, and driving connections between the motor and thegrinding-wheel shafts, substantially as described. I

3. In a car-wheel-grindin g machine,aframe constructed to be mounted onand across a track, comprising at its ends, basesupports which areadjustably fixed to the cross members of said frame, grinding-wheelstandards movably mounted on said base-supports, grinding-Wheel shaftswith grinding-wheels journaled and endwise movable in said standards,means for feeding the standards forward, means for imparting endwisemovements to the grinding-wheel shafts, a motor mounted on the saidframe intermediate between said base-supports, and driving connectionsbetween the motor and the inner ends of the grinding-wheel shafts,substantially as described.

4:. In a car-Wheel-grinding machine, in combination, a frame comprisingthe base-supports A A and the cross tie-bars a, the standards B havingtheir bases guided along said base-supports, the shafts G O journaledin, and adapted to move endwise through, said standards, and having attheir outer extremities the grinding-wheels, levers pivotally supportedon the bases of said standards and having engagements with said shaftsfor moving them endwise, means for moving said standards forward, amotorsupported by said cross members of the framebetween thebasesupports, and mediums of driving connection between thedriving-shaft of said motor and the inner ends of the grinding-wheelshafts, substantially as and for the purposes set forth.

5. In a car-wheel-grinding machine in comports A A, each having theupturned ear-lug and the cross tie-bars ahaving the clamps d cl adjustably confined thereon, the standards B having the bases B which aremovably guided along said base-supports, and each provided with theear-lu g, the screw-shafts having feed engagements with the ear-lugs ofthe parts A and B and having the hand-wheels, the shafts O Ojournaled inand adapted to move endwise through said standards and having at theirouter extremities the grinding-wheels, levers pivotally supported on thebases of said standards and in engagement with said shafts formovingthem endwise, a cross plate or bar extending between said tie-barsand located between the aforesaid base-supports, a motor suspended fromsaid cross-plate and mediums of driving connection between thedriving-shaft of said motor and the inner ends of the grinding-wheelshafts, substan-' are independent of each other, substantially asdescribed.

In testimony that I claim the foregoing as my invention Ihave signed myname, in presence of two witnesses, this 28th day of November, 1896.

D. 0. SWEET. Witnesses:

WM. S. BELLoWs, MABEL A. CAMPBELL.

